Tandem Diabetes CareTNDM
13F holders, Q2 2025 (June 30)270holders −5
39new positions
42sold out
7famous investors
$18.61avg. 13F price*
At the end of Q2 2025, 270 institutions reported holding Tandem Diabetes Care Inc. (TNDM) in their 13F filings, down 5 from Q1 2025. 39 opened new positions and 42 sold out. The largest holders were BlackRock, Inc. ($202.6M), Vanguard Group Inc. ($137.4M) and Sessa Capital IM, L.P. ($93.2M). 7 famous investors held it, including Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Joel Greenblatt (0.0% of Gotham Asset Management's portfolio).
- Company
- Tandem Diabetes Care Inc.
- CUSIP
- 875372203
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 39 | $82.9M |
| Exits | 42 | $59.7M |
All 13F filers, Q1 2025 → Q2 2025: 14,719,355 shares bought and 6,756,647 shares sold, net +7,962,708 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 270 holders
| BlackRock, Inc. | 0.00% | Reduce -1.4% | 10,871,558 | $202.6M |
| Vanguard Group Inc. | 0.00% | Add +1.1% | 7,369,830 | $137.4M |
| Sessa Capital IM, L.P. | 2.84% | Add +11.9% | 5,000,000 | $93.2M |
| GW&K Investment Management, LLC | 0.48% | Add +0.9% | 2,890,130 | $53.9M |
| ArrowMark Colorado Holdings LLC | 0.91% | Reduce -0.6% | 2,699,549 | $50.3M |
| State Street Corp. | 0.00% | Reduce -1.6% | 2,645,889 | $49.3M |
| Hood River Capital Management LLC | 0.67% | Add +10.9% | 2,564,978 | $47.8M |
| Goldman Sachs Group Inc. | 0.01% | Add +164.8% | 1,886,475 | $35.2M |
| Paradice Investment Management LLC | 6.69% | Add +7.1% | 1,767,179 | $32.9M |
| Stephens Investment Management Group LLC | 0.43% | Add +1.8% | 1,737,769 | $32.4M |
| Jennison Associates LLC | 0.02% | Add +12.3% | 1,658,942 | $30.9M |
| Geode Capital Management, LLC | 0.00% | Add +3.1% | 1,606,336 | $29.9M |
| Champlain Investment Partners, LLC | 0.19% | Add +6.3% | 1,455,123 | $27.1M |
| Jacobs Levy Equity Management, Inc. | 0.10% | Reduce -2.7% | 1,431,307 | $26.7M |
| UBS Group AG | 0.01% | Add +65.6% | 1,383,944 | $25.8M |
| Ophir Asset Management Pty Ltd | 3.88% | New | 1,464,956 | $24.4M |
| Morgan Stanley | 0.00% | Add +35.9% | 1,265,534 | $23.6M |
| Two Sigma Investments, LP | 0.04% | Add +92.2% | 1,232,727 | $23.0M |
| Baillie Gifford & Co. | 0.02% | Add +53.7% | 1,125,728 | $21.0M |
| Brown Advisory Inc. | 0.03% | Add +14.2% | 1,057,115 | $19.7M |
| Millennium Management | 0.02% | Add +325.8% | 969,073 | $18.1M |
| Two Sigma Advisers, LP | 0.03% | Add +30.7% | 888,083 | $16.6M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.05% | Add +21.6% | 784,218 | $14.6M |
| Capital World Investors | 0.00% | No change | 767,000 | $14.3M |
| Northern Trust Corp. | 0.00% | Add +1.6% | 700,381 | $13.1M |
| Fred Alger Management, LLC | 0.06% | Reduce -54.1% | 667,345 | $12.4M |
| Nuveen, LLC | 0.00% | Add +103.8% | 628,497 | $11.7M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +8.2% | 617,000 | $11.5M |
| Walleye Capital LLC | 0.11% | New | 567,223 | $10.6M |
| Barclays PLC | 0.00% | Add +10.3% | 567,072 | $10.6M |
| JPMorgan Chase & Co. | 0.00% | Add +140.5% | 562,254 | $10.5M |
| Brown Capital Management LLC | 0.30% | Reduce -6.7% | 551,207 | $10.3M |
| Royal Bank of Canada | 0.00% | Add +159.6% | 549,542 | $10.2M |
| Bank of America Corp. | 0.00% | Add +16.9% | 545,504 | $10.2M |
| Algert Global LLC | 0.21% | Add +153.6% | 530,914 | $9.9M |
| FMR LLC | 0.00% | Reduce -63.5% | 524,675 | $9.8M |
| Ameriprise Financial Inc. | 0.00% | Add +8.0% | 419,037 | $7.8M |
| ExodusPoint Capital Management, LP | 0.09% | Add +2510.5% | 417,308 | $7.8M |
| Prudential Financial Inc. | 0.01% | Add +122.5% | 382,804 | $7.7M |
| Bank of New York Mellon Corp | 0.00% | Reduce -2.1% | 399,003 | $7.4M |
| Principal Financial Group Inc. | 0.00% | Reduce -1.1% | 395,226 | $7.4M |
| Trexquant Investment LP | 0.08% | New | 368,530 | $6.9M |
| Frontier Capital Management Co. LLC | 0.06% | Reduce -0.3% | 364,098 | $6.8M |
| BNP Paribas Financial Markets | 0.01% | Reduce -21.3% | 361,878 | $6.7M |
| Acadian Asset Management LLC | 0.01% | Add +54.0% | 358,516 | $6.7M |
| Aberdeen Group plc | 0.01% | No change | 356,218 | $6.6M |
| Citadel Advisors | 0.01% | Add +209.5% | 352,959 | $6.6M |
| Silvercrest Asset Management Group LLC | 0.04% | Add +0.0% | 346,160 | $6.5M |
| Renaissance Technologies | 0.01% | Add +19.6% | 342,327 | $6.4M |
| D. E. Shaw & Co. | 0.01% | New | 338,668 | $6.3M |
| Quantinno Capital Management LP | 0.03% | Add +32.2% | 319,659 | $6.0M |
| Tudor Investment Corporation | 0.04% | Reduce -23.1% | 311,517 | $5.8M |
| DAFNA Capital Management LLC | 1.54% | No change | 294,208 | $5.5M |
| Envestnet Asset Management Inc. | 0.00% | Reduce -12.7% | 278,010 | $5.2M |
| Alliancebernstein L.P. | 0.00% | Add +49.6% | 270,339 | $5.0M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +38.6% | 268,903 | $5.0M |
| Edmond DE Rothschild Holding S.A. | 0.08% | Add +4.0% | 262,600 | $4.9M |
| Capital Fund Management S.A. | 0.05% | Add +575.4% | 262,431 | $4.9M |
| Susquehanna International Group, LLP | 0.01% | Add +41.3% | 257,459 | $4.8M |
| Lisanti Capital Growth, LLC | 1.31% | New | 253,840 | $4.7M |
| Adage Capital Partners Gp, L.L.C. | 0.01% | New | 250,000 | $4.7M |
| Susquehanna Portfolio Strategies, LLC | 0.10% | New | 246,989 | $4.6M |
| Balyasny Asset Management L.P. | 0.01% | Reduce -70.0% | 230,934 | $4.3M |
| Public Sector Pension Investment Board | 0.02% | Add +9.1% | 227,104 | $4.2M |
| Invesco Ltd. | 0.00% | Reduce -4.4% | 226,789 | $4.2M |
| Verition Fund Management LLC | 0.02% | Add +630.6% | 218,586 | $4.1M |
| Sector Gamma As | 1.28% | Add +16.6% | 210,523 | $3.9M |
| Bank of Montreal | 0.00% | Add +1746.6% | 210,332 | $3.9M |
| Soleus Capital Management, L.P. | 0.26% | Reduce -59.7% | 200,000 | $3.7M |
| Schonfeld Strategic Advisors LLC | 0.03% | New | 199,756 | $3.7M |
| Russell Investments Group, Ltd. | 0.00% | Add +42.9% | 198,713 | $3.7M |
| New York State Common Retirement Fund | 0.00% | No change | 197,775 | $3.7M |
| Rhumbline Advisers | 0.00% | Add +8.4% | 193,219 | $3.6M |
| KBC Group NV | 0.01% | Reduce -1.0% | 191,837 | $3.6M |
| FIL Ltd | 0.00% | Reduce -0.6% | 191,417 | $3.6M |
| 1492 Capital Management LLC | 1.63% | Add +740.9% | 188,754 | $3.5M |
| Sei Investments Co. | 0.00% | Add +50.2% | 186,731 | $3.5M |
| Legal & General Group Plc | 0.00% | Add +4.4% | 184,853 | $3.4M |
| Squarepoint Ops LLC | 0.01% | Add +45.8% | 180,660 | $3.4M |
| Divisadero Street Capital Management, LP | 0.22% | No change | 174,692 | $3.3M |
| Engineers Gate Manager LP | 0.04% | Reduce -10.7% | 170,488 | $3.2M |
| PDT Partners, LLC | 0.18% | New | 170,420 | $3.2M |
| Jump Financial, LLC | 0.04% | New | 162,950 | $3.0M |
| Aquatic Capital Management LLC | 0.06% | Add +615.4% | 162,030 | $3.0M |
| State of Wisconsin Investment Board | 0.01% | Add +2.8% | 160,619 | $3.0M |
| Raymond James Financial Inc. | 0.00% | Reduce -23.2% | 143,274 | $2.7M |
| Mizuho Markets Americas LLC | 0.09% | Add +19.8% | 138,742 | $2.6M |
| Voya Investment Management LLC | 0.00% | Add +0.8% | 137,749 | $2.6M |
| Swiss National Bank | 0.00% | No change | 127,300 | $2.4M |
| Truist Financial Corp. | 0.00% | Reduce -10.8% | 123,531 | $2.3M |
| Formula Growth Ltd. | 0.86% | Reduce -1.5% | 122,096 | $2.3M |
| HighTower Advisors, LLC | 0.00% | Add +80.8% | 121,460 | $2.3M |
| Kennedy Capital Management LLC | 0.05% | Reduce -37.1% | 117,702 | $2.2M |
| Rice Hall James & Associates, LLC | 0.10% | Reduce -0.9% | 103,954 | $1.9M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | Add +15.4% | 101,346 | $1.9M |
| Brevan Howard Capital Management LP | 0.02% | Add +778.9% | 94,734 | $1.8M |
| Jane Street Group, LLC | 0.00% | New | 90,108 | $1.7M |
| Citigroup Inc. | 0.00% | Reduce -13.9% | 87,125 | $1.6M |
| Banque Pictet & Cie SA | 0.02% | New | 84,028 | $1.6M |
| Gotham Asset Management | 0.01% | Add +20.1% | 82,432 | $1.5M |
"% of holder's portfolio" is TNDM's weight in each manager's 13F, not the share of Tandem Diabetes Care Inc. the manager owns.